CN110410472B - Transmission device, variable pitch system and wind generating set - Google Patents

Transmission device, variable pitch system and wind generating set Download PDF

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Publication number
CN110410472B
CN110410472B CN201810393251.9A CN201810393251A CN110410472B CN 110410472 B CN110410472 B CN 110410472B CN 201810393251 A CN201810393251 A CN 201810393251A CN 110410472 B CN110410472 B CN 110410472B
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China
Prior art keywords
transmission
traction
rotating
tension
wheel
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CN201810393251.9A
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Chinese (zh)
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CN110410472A (en
Inventor
王兆峻
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Jinfeng Technology Co ltd
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Xinjiang Goldwind Science and Technology Co Ltd
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Priority to CN201810393251.9A priority Critical patent/CN110410472B/en
Publication of CN110410472A publication Critical patent/CN110410472A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D15/00—Transmission of mechanical power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/001—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for conveying reciprocating or limited rotary motion
    • F16H19/003—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for conveying reciprocating or limited rotary motion comprising a flexible member
    • F16H19/005—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for conveying reciprocating or limited rotary motion comprising a flexible member for conveying oscillating or limited rotary motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2270/00—Control
    • F05B2270/60—Control system actuates through
    • F05B2270/606—Control system actuates through mechanical actuators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Friction Gearing (AREA)
  • Wind Motors (AREA)

Abstract

The embodiment of the invention provides a transmission device, a variable pitch system and a wind generating set, wherein the transmission device is used for driving a rotating part to rotate and comprises: the first transmission part is a rotatable part; the traction part is provided with a first end and a second end which are opposite in the extending direction of the traction part, the first end and the second end are both connected with the rotating part, and the traction part bypasses the first transmission part so as to form an accommodating space between the traction part and the rotating part; and the tensioning wheel is arranged in the accommodating space and provides supporting force for the traction part from the inside of the accommodating space to the outside of the accommodating space. In the embodiment of the invention, the traction part is only bent towards one direction, but not towards two directions simultaneously, so that the loss of the traction part can be effectively reduced, and the service life of the traction part is prolonged.

Description

Transmission device, variable pitch system and wind generating set
Technical Field
The invention relates to the technical field of wind driven generators, in particular to a transmission device and a wind driven generator set.
Background
The variable pitch system is important equipment of a large-scale wind driven generator, and the wind driven generator needs to adjust the windward angle of blades in real time according to the wind speed, so that a fan can obtain electric energy at low wind speed, and captures wind energy with fixed size when the wind speed is higher than the rated wind speed so as to optimize the power generation parameters of the fan.
The operation convenience and the working reliability of a variable pitch system directly influence the efficiency of a wind driven generator, the traditional motor executing variable pitch mechanism utilizes a traction part to realize the transmission purpose, and the traction part is compressed from outside to inside in order to increase the wrap angle of a driving wheel. In this way, the traction component bears alternating load during transmission, and the service life of the synchronous belt is seriously influenced.
Therefore, a new transmission device, a pitch system and a wind generating set are needed.
Disclosure of Invention
The embodiment of the invention provides a transmission device, a variable pitch system and a wind generating set, and aims to prolong the service life of a traction component.
An embodiment of the present invention provides a transmission device, which is used for driving a rotating component to rotate, and includes: the first transmission part is a rotatable part; the traction part is provided with a first end and a second end which are opposite in the extending direction of the traction part, the first end and the second end are both connected with the rotating part, and the traction part bypasses the first transmission part so as to form an accommodating space between the traction part and the rotating part; and the tensioning wheel is arranged in the accommodating space and provides supporting force for the traction part from the inside of the accommodating space to the outside of the accommodating space.
According to an aspect of the invention, further comprising:
the second transmission component is arranged in the accommodating space, and the second transmission component and the first transmission component are both arranged on the peripheral side of the rotating component;
the first end passes over the first transmission member and is connected to the rotating member, and the second end passes over the second transmission member and is connected to the rotating member.
According to one aspect of the invention, the first end and the second end are both located outside the first transmission member and the second transmission member; alternatively, the first end and the second end are both located between the first transmission member and the second transmission member.
According to one aspect of the invention, the traction means comprises a tension section connected between the first transmission means and the second transmission means, the tension wheel being arranged in the tension section.
According to one aspect of the invention, the number of the tension pulleys is more than two, and the more than two tension pulleys are uniformly distributed in the tension section.
According to one aspect of the present invention, a line between the rotation center of the first transmission member and the rotation center of the rotating member is a first line, a line between the rotation center of the second transmission member and the rotation center of the rotating member is a second line, and an angle between the first line and the second line is greater than or equal to 90 degrees.
According to one aspect of the invention, one of the first transmission part and the second transmission part is a driving wheel, the other one is a driven wheel, and the radius of the driving wheel is larger than or equal to that of the driven wheel.
According to one aspect of the invention, an auxiliary braking device is provided on the driven wheel to assist in braking the traction member.
According to one aspect of the present invention, the first end and the second end are both located between the first transmission member and the second transmission member, and a distance between the first end and the second end along the circumferential direction of the rotation member is less than or equal to a second preset distance, wherein the second preset distance is greater than or equal to zero.
According to one aspect of the invention, the first end is provided with a fixed support so that the first end is fixed to the rotating member by the fixed support;
the second end is provided with a sliding support so that the relative position of the second end and the rotating member is adjustable.
According to an aspect of the invention, further comprising:
the tensioning wheel is arranged on the supporting surface;
the included angle between the axis of the tension wheel and the supporting surface is adjustable, so that the tension wheel can adjust the tension degree of the traction part along the width direction of the traction part.
According to one aspect of the invention, at least one tensioning wheel is provided with more than two pressure sensors, the more than two pressure sensors are arranged along the axial direction of the tensioning wheel, and the more than two pressure sensors are used for acquiring the pressure value provided by the traction component to the tensioning wheel.
According to an aspect of the invention, further comprising: the processor is used for acquiring a pressure value and determining the tensioning degree of the traction component according to the pressure value; the processor is also used for adjusting the included angle between the axis of the tension wheel and the supporting surface according to the tension degree.
A second embodiment of the present invention provides a pitch system for a wind turbine generator system, the pitch system including: the variable-pitch bearing comprises a fixed ring and a rotating ring, wherein the fixed ring is connected to the hub, the rotating ring is connected to the blades, and the rotating ring is used for driving the blades to rotate relative to the hub; in the transmission device, the rotating ring is a rotating part, and the transmission device is used for driving the rotating ring to rotate.
The third embodiment of the invention provides a wind generating set, which comprises the variable pitch system.
In the embodiment of the invention, the traction part bypasses the first transmission part and the rotating part to form the accommodating space, and the tension wheel and the first transmission part are arranged in the accommodating space, so that the traction part is bent only in one direction instead of two directions simultaneously, thereby effectively reducing the loss of the traction part and prolonging the service life of the traction part.
Drawings
Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings in which like or similar reference characters refer to the same or similar parts.
FIG. 1 is a schematic diagram of a prior art transmission;
FIG. 2 is a schematic structural diagram of a transmission in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of a first operating condition of a tensioner in a transmission according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a tension wheel in a second use state in the transmission device according to the embodiment of the invention.
Description of reference numerals:
100. a transmission device;
110. a first transmission member;
120. a second transmission member;
130. a tension wheel; 131. a fixing member; 132. a connecting member;
140. a traction member; 141. a first end; 142. a second end; 143. a first connection section; 144. a second connection section; 145. a tension section; 146. a fixed support; 147. a sliding support;
150. an accommodating space;
160. a support surface;
200. a pitch bearing; 210. a stationary ring; 220. rotating the ring;
300. a transmission member;
310. a driving wheel;
320. a driven wheel;
330. and (3) braking the belt.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The directional terms appearing in the following description are intended to be illustrative in all directions, and are not intended to limit the specific construction of embodiments of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
As shown in fig. 1, a transmission component 300 in a pitch system in the prior art includes a driving wheel 310, a driven wheel 320 and a brake band 330, in order to increase the wrap angle of the driving wheel 310, the driven wheel 320 presses the brake band 330 from the outside to the inside of the brake band 330, when the transmission component 300 operates, the outer side surface of the brake band 330 is bent inward by the force of the driven wheel 320, the inner side surface of the brake band 330 is bent outward by the force of the driving wheel 310, and during the operation of the transmission component 300, the brake band 330 is bent continuously in two directions, so that the brake band 330 is subjected to alternating load during transmission, which increases the loss of the brake band 330 and seriously affects the service life of the brake band 330.
For a better understanding of the present invention, the transmission, the pitch system and the wind turbine generator set according to the embodiments of the present invention will be described in detail below with reference to fig. 2 to 4.
Fig. 2 is a schematic structural diagram of a transmission device 100 according to an embodiment of the present invention, where the transmission device 100 is used for driving a rotating component to rotate, and includes: a first transmission member 110 which is a rotatable member; a traction member 140 having a first end 141 and a second end 142 opposite to each other in an extending direction thereof, the first end 141 and the second end 142 being connected to the rotation member, the traction member 140 bypassing the first transmission member 110 to form a receiving space 150 between the traction member 140 and the rotation member; the tension wheel 130 is disposed in the accommodating space 150 and provides a supporting force from the inside of the accommodating space 150 to the outside of the accommodating space 150 to the traction member 140.
In the embodiment of the present invention, the first transmission member 110 drives the rotation member to rotate through the traction member 140, the traction member 140 bypasses the first transmission member 110 and the rotation member to form the accommodating space 150, the tension pulley 130 and the first transmission member 110 are both disposed in the accommodating space 150, under the action of the tension pulley 130 and the first transmission member 110, the traction member 140 can only bend from the inside of the accommodating space 150 to the outside of the accommodating space 150, so that the traction member 140 only bends towards one direction, but not towards two directions at the same time, and only the surface of the traction member 140 close to the accommodating space 150 is acted by the first transmission member 110 and the tension pulley 130, thereby effectively reducing the loss of the traction member 140 and prolonging the service life of the traction member 140.
In some alternative embodiments, the transmission 100 further comprises: a second transmission member 120 disposed in the accommodating space 150, wherein the second transmission member 120 and the first transmission member 110 are disposed on the circumferential side of the rotation member; the first end 141 passes over the first transmission member 110 and is connected to the rotation member, and the second end 142 passes over the second transmission member 120 and is connected to the rotation member. In these alternative embodiments, the first end 141 is connected to the rotating component after passing through the first transmission component 110, and the second end 142 is connected to the rotating component after passing through the second transmission component 120, so that both the first transmission component 110 and the second transmission component 120 can drive the traction component 140, and thus the second transmission component 120 can assist the first transmission component 110 to drive the rotating component to rotate. At least one of the first transmission member 110 and the second transmission member 120 is a driving member, and the driving member drives the traction member 140, so that the traction member 140 drives the rotation member to rotate.
The positions of the first end 141 and the second end 142 are not limited herein, for example, the first end 141 and the second end 142 are located outside the first transmission member 110 and the second transmission member 120; or the first and second ends 141 and 142 are located between the first transmission member 110 and the second transmission member 120. Preferably, the first end 141 and the second end 142 are located between the first transmission member 110 and the second transmission member 120, such that the wrap angle of the traction member 140 to the first transmission member 110 and the second transmission member 120 is large enough to reduce the driving force required to drive the rotation member to rotate.
The relative positions of the first transmission member 110, the second transmission member 120 and the rotating member are not limited, for example, the first transmission member 110 and the second transmission member 120 are disposed adjacent to the rotating member, the distance between the first transmission member 110 and the second transmission member 120 and the rotating member is less than or equal to a first preset distance, and the first transmission member 110 and the second transmission member 120 are closer to the rotating member, so that the occupied space of the transmission device 100 can be effectively reduced. Further, in order to secure the wrap angle at the first transmission member 110 and the second transmission member 120, the distance of the first transmission member 110 from the outer surface of the rotation member is equal to the distance of the second transmission member 120 from the outer surface of the rotation member. Meanwhile, when the first and second ends 141 and 142 are located between the first and second transmission members 110 and 120, the first and second transmission members 110 and 120 should be spaced apart from the rotation member by a distance that allows the traction member 140 to pass through.
In order to reduce the stress of the traction member 140, the first transmission member 110 and the second transmission member 120 are located on the same radial section of the rotating component, that is, the projection of the traction member 140 on the axial section of the rotating component, which passes through the first transmission member 110 and the second transmission member 120, is a straight line, so that when the traction member 140 moves between the first transmission member 110 and the second transmission member 120, the traction member is subjected to the tension provided by the first transmission member 110 and the second transmission member 120, and is not subjected to the torsion provided by the first transmission member 110 and the second transmission member 120.
The distance between the first end 141 and the second end 142 is not limited herein, and in some alternative embodiments, when the first end 141 and the second end 142 are both located between the first transmission member 110 and the second transmission member 120, the distance between the first end 141 and the second end 142 along the circumferential direction of the rotation member is less than or equal to a second preset distance, wherein the second preset distance is greater than or equal to zero. The distance between the first end 141 and the second end 142 is short, so that when the rotating component is driven by the first end 141 or the second end 142 to rotate, the rotating angle is large, and the use requirements of users are met. The second preset distance may be set according to actual requirements, and is not limited herein, for example, the second preset distance is 20cm, 10cm or less, as long as the first end 141 and the second end 142 do not interfere with each other.
The traction element 140 comprises, in its direction of extension, a first connecting portion 143, a tensioning portion 145 and a second connecting portion 144, which are arranged one after the other, the first connecting portion 143 being located between the first transmission element 110 and the first end 141, the second connecting portion 144 being located between the second transmission element 120 and the second end 142, and the tensioning portion 145 being located between the first transmission element 110 and the second transmission element 120. It can be understood that the first connecting section 143, the second connecting section 144 and the tensioning section 145 are not fixed, and during the operation of the transmission device 100, as the first transmission member 110 and the second transmission member 120 rotate, the traction member 140 drives the rotation member to rotate, and the position of the traction member 140 relative to the first transmission member 110 and the second transmission member 120 changes, wherein a certain section of the traction member 140 is located between the first transmission member 110 and the first end 141, and the first connecting section 143 of the traction member 140 can be regarded as the first connecting section 144, and a certain section of the traction member 140 is located between the second transmission member 120 and the second end 142, and the tensioning section 145 can be regarded as the tensioning section 145, and a certain section of the traction member 140 is located between the first transmission member 110 and the second transmission member 120.
In these optional embodiments, the first connecting section 143 and the second connecting section 144 are both attached to the rotating member, and receive the acting force provided by the rotating member from the outside of the accommodating space 150 toward the inside of the accommodating space 150, so that the first connecting section 143 is bent toward the inside of the accommodating space 150, and similarly, the second connecting section 144 is also bent toward the inside of the accommodating space 150, but because the radius of the rotating member is larger under normal conditions, the bending degree at the first connecting section 143 and the second connecting section 144 is very limited, and therefore, the service life of the traction member 140 is not greatly affected, and meanwhile, due to the supporting effect of the rotating member on the traction member 140, it can be further ensured that the traction member 140 is not shaken due to severe vibration, and the service life of the traction member 140 can be further prolonged.
In some alternative embodiments, tensioner 130 is disposed at tensioner length 145. In these alternative embodiments, the tension wheel 130 disposed at the tension section 145 provides a supporting force to the tension section 145 toward the outside of the accommodating space 150, the tension wheel 130 is located between the first transmission member 110 and the second transmission member 120, and has a certain distance from the first transmission member 110 to the second transmission member 120, and the tension wheel 130 can support the tension section 145 as long as it provides a small supporting force, which effectively reduces the load of the tension wheel 130. Meanwhile, because the load of the tension wheel 130 is smaller, the size of the tension wheel 130 can be designed to be smaller, and the occupied space of the transmission device 100 is further saved.
The number of the tension pulleys 130 is not limited herein, as long as the tension pulleys 130 can support the tension sections 145 such that the tension sections 145 do not interfere with the rotating member, the first connecting section 143, and the second connecting section 144. Here, the number of tension pulleys 130 is three, and the three tension pulleys 130 are uniformly arranged in the tension section 145. The three tensioning wheels 130 can further share the supporting force required to be borne by each tensioning wheel 130, the load borne by each tensioning wheel 130 can be further reduced, and the service life of the tensioning wheels 130 is prolonged. Since the load applied to the tension pulley 130 is reduced, the size of the tension pulley 130 can be further reduced, and the occupied space of the transmission 100 can be further saved. It can be understood that the number of the tension pulleys 130 may be not only three, but also two, four, etc., as long as there are more than two tension pulleys 130, and the more than two tension pulleys 130 are uniformly distributed in the tension section 145.
In some optional embodiments, a connection line between the rotation center of the first transmission member 110 and the rotation center of the rotation member is a first connection line, a connection line between the rotation center of the second transmission member 120 and the rotation center of the rotation member is a second connection line, and an included angle α between the first connection line and the second connection line is greater than or equal to 90 degrees.
In these alternative embodiments, the included angle α between the first connection line and the second connection line is greater than or equal to 90 degrees, so that when the first transmission member 110 and the second transmission member 120 drive the rotating members through the traction member 140, the rotating angle of the rotating members is large enough to meet the use requirement of the user. Especially, when the transmission device 100 is applied to a variable pitch system of a wind generating set, the use requirement of the variable pitch system can be met. Become oar system including becoming the oar bearing, it includes retainer plate and rotating ring to become the oar bearing, the retainer plate is connected in wind generating set's wheel hub, the rotating ring is connected in the blade, rotary part is equivalent to the rotating ring, transmission 100 is used for driving the rotating ring and rotates, thereby make the relative wheel hub of blade take place to rotate, the blade generally needs to be adjusted within the scope about 90 degrees, consequently, the rotating ring needs rotate in the scope about 90 degrees, transmission 100 of this embodiment can satisfy this user demand. In order to leave enough adjustment margin and simultaneously consider the size requirement of the transmission device 100, the included angle between the first connecting line and the second connecting line can be about 100 degrees, so that the transmission device 100 does not have too large size while meeting the adjustment requirement.
In some alternative embodiments, the first transmission member 110 is a driving wheel, the second transmission member 120 is a driven wheel, and the radius of the first transmission member 110 is greater than or equal to the radius of the second transmission member 120. It is understood that the arrangement of the first transmission component 110 and the second transmission component 120 is not limited thereto, for example, the first transmission component 110 is a driven wheel, the second transmission component 120 is a driving wheel, as long as one of the first transmission component 110 and the second transmission component 120 is the driving wheel, the other is the driven wheel, and the radius of the driving wheel is greater than or equal to the radius of the driven wheel.
In these alternative embodiments, the radius of the first transmission member 110 as the driving wheel is greater than the radius of the second transmission member 120 as the driven wheel, so that the wrap angle formed by the traction member 140 on the driving wheel can be ensured to be greater than or equal to the wrap angle formed by the traction member 140 on the driven wheel, thereby further reducing the driving force output by the driving wheel, and driving the transmission device 100 to operate with less force.
In some alternative embodiments, an auxiliary braking device is further disposed on the second transmission member 120 to assist in braking the traction member 140. It is understood that when the second transmission member 120 is a driven wheel, an auxiliary brake device is provided on the second transmission member 120 as the driven wheel, and when the first transmission member 110 is a driven wheel, an auxiliary brake device is provided on the first transmission member 110 as the driven wheel.
In these alternative embodiments, the second transmission member 120 as a driven wheel is provided with an auxiliary braking device, and during the braking process of the transmission device 100, the second transmission member 120 as a driven wheel can assist the first transmission member 110 as a driving wheel to brake, so as to improve the braking effect. The arrangement manner of the auxiliary braking device is not limited herein, as long as the auxiliary braking device can brake the second transmission member 120 to prevent the second transmission member 120 from rotating.
In some alternative embodiments, the first end 141 is provided with a fixed mount 146, such that the first end 141 is fixed to the rotating member by the fixed mount 146; second end 142 is provided with a sliding support 147 to allow the relative position of second end 142 and the rotating member to be adjusted. It is understood that the first end 141 and the second end 142 are not limited to this, for example, the first end 141 is provided with a sliding support 147, the first end 141 can be adjusted relative to the rotating member by the sliding support 147, the second end 142 is provided with a fixed support 146, and the second end 142 is fixed on the surface of the rotating member by the fixed support 146. As long as one of the first and second ends 141 and 142 is provided with the fixed holder 146 and the other is provided with the sliding holder 147.
In these alternative embodiments, the sliding support 147 is disposed on the second end 142, and the relative position of the second end 142 and the rotating component is adjustable, so that the tension of the traction component 140 in the extending direction thereof can be adjusted by adjusting the relative position of the second end 142 and the rotating component, so that the traction component 140 can be used under a proper tension, damage to the traction component 140 due to over-tightening or over-loosening is prevented, and the service life of the traction component 140 is further prolonged.
In some alternative embodiments, the transmission 100 further comprises a support surface 160, and the tension wheel 130 is disposed on the support surface 160; the angle between the axis of the idler 130 and the support surface 160 is adjustable to enable the idler 130 to adjust the tension of the traction member 140 in the width direction of the traction member 140.
Referring to fig. 3 and 4, in these alternative embodiments, the angle β between the axis of the tension wheel 130 and the support surface 160 is adjustable, so that the tension in the width direction of the traction member 140 is adjustable, wherein the width direction of the traction member 140 is along the direction perpendicular to the paper in fig. 2 and the horizontal direction in fig. 3. As shown in fig. 4, when the side of traction member 140 away from support surface 160 is more loosely tensioned, the axis of tensioning wheel 130 adjusts upward, thereby tightening the side of traction member 140 away from support surface 160; when the side of the traction member 140 adjacent to the support surface 160 is more loosely tensioned, the axis of the tensioning wheel 130 is adjusted downward, thereby tightening the side of the traction member 140 adjacent to the support surface 160. By adjusting the tension wheel 130, the tension degree of the traction member 140 in the width direction thereof is within a proper range, so that the loss of the traction member 140 is further reduced, and the service life of the traction member 140 is prolonged.
There are various embodiments for obtaining the tension in the width direction of the traction member 140, such as: the tension degree of the traction part 140 is observed manually, the included angle beta is adjusted according to the tension degree, and the operation is simple and the implementation is convenient. Alternatively, at least one tensioning wheel 130 is provided with two or more pressure sensors (not shown in the drawings), the two or more pressure sensors are arranged on the tensioning wheel 130 along the axial direction of the tensioning wheel 130, the two or more pressure sensors are used for detecting pressure values provided by different positions of the traction member 140 to the tensioning wheel 130 along the width direction, the tension degree of the traction member 140 in the width direction can be determined according to the pressure values obtained by the two or more pressure sensors, and the included angle β is adjusted according to the tension degree. The tension degree of the traction part 140 in the width direction can be acquired in real time by arranging the pressure sensor, the tension degree of the traction part 140 can be known in real time conveniently, and the tension wheel 130 can be adjusted in time, so that the traction part 140 is kept within a proper tension degree range for a long time, and the service life of the traction part 140 is prolonged.
There are various embodiments for adjusting the included angle β, and as an alternative example, the tension wheel 130 is fixed to the supporting surface 160 by a fixing member 131, a connecting member 132 extending in the axial direction of the tension wheel 130 is provided at different positions of the fixing member 131, the fixing member 131 is connected to the supporting surface 160 by the connecting member 132, and the connecting member 132 is adjusted according to the tension degree of the traction member 140, so that the position of the fixing member 131 relative to the supporting surface 160 is changed, thereby changing the included angle β. Preferably, the connecting member 132 is disposed on both sides of the fixing member 131 in the adjustment direction of the axis of the tension pulley 130, that is, when the axis of the tension pulley 130 is adjusted in the vertical direction, the connecting member 132 is disposed on both sides of the fixing member 131 in the vertical direction. The connecting member 132 may be a bolt, the fixing member 131 is provided with a through hole, one end of the bolt is fixed to the supporting surface 160, and the other end of the bolt is screwed into the through hole, and by screwing the bolt, the relative distance between the fixing member 131 and the supporting surface 160 can be adjusted, so that the relative position between the fixing member 131 and the supporting surface 160 is changed, and the included angle β is adjusted; or the connecting component 132 is a telescopic rod, one end of the telescopic rod is fixed on the supporting surface 160, the other end of the telescopic rod is fixed on the fixing component 131, the relative distance between the fixing component 131 and the supporting surface 160 is adjusted by adjusting the length of the telescopic rod, the relative position between the fixing component 131 and the supporting surface 160 is adjusted, and the included angle β is adjusted.
Further, the transmission 100 further comprises a processor (not shown) for obtaining the tension degree of the traction member 140, and adjusting the relative position of the fixing member 131 and the supporting surface 160 according to the tension degree, so as to adjust the included angle β. Still further, the processor is connected to the two or more pressure sensors, and is configured to obtain pressure values measured by the two or more pressure sensors, determine a tensioning degree of the traction member 140 according to the pressure values, and adjust the connection member 132 according to the tensioning degree, so as to adjust the included angle β. In these optional embodiments, the processor may obtain the tensioning degree of the traction component 140 in real time, and adjust the included angle β at any time according to the tensioning degree, so as to realize automatic adjustment of the included angle β, and the method is simple to operate and convenient to implement. Meanwhile, the tension degree of the traction component 140 in the width direction is always kept in a reasonable range, the stress of the traction component 140 in the width direction is balanced, the loss of the traction component 140 caused by unbalanced stress is reduced, and the service life of the traction component 140 is prolonged.
The second embodiment of the present invention further provides a pitch system, which is used for a wind turbine generator system, the wind turbine generator system includes a hub and blades, and the pitch system includes: the variable-pitch bearing 200 comprises a fixed ring 210 and a rotating ring 220, wherein the fixed ring 210 is connected to a hub, the rotating ring 220 is connected to a blade, and the rotating ring 220 is used for driving the blade to rotate relative to the hub; in the transmission device 100 according to any of the first embodiments, the rotating ring 220 is a rotating component, and the transmission device 100 is configured to drive the rotating ring 220 to rotate.
In the embodiment of the present invention, the transmission device 100 is disposed on the rotating ring 220 of the pitch bearing 200, and the transmission device 100 drives the rotating ring 220 to rotate relative to the fixing ring 210, so that the blades connected to the rotating ring 220 rotate relative to the hub connected to the fixing ring 210, thereby achieving the purpose of changing the pitch.
In some alternative embodiments, the rotating ring 220 may be an outer ring or an inner ring of the pitch bearing 200, which is not limited herein, and when the outer ring of the pitch bearing 200 is connected to the blade, that is, the outer ring is the rotating ring 220, the transmission device 100 is disposed on an outer surface of the outer ring; when the inner ring of the pitch bearing 200 is connected to the blade, i.e. the inner ring is a rotating ring 220, the inner ring has a protrusion protruding from the outer ring along the radial direction of the inner ring, and the transmission device 100 is disposed on the outer surface of the protrusion. As long as the transmission device 100 can drive the rotating ring 220 to rotate relative to the fixed ring 210, so that the blades rotate relative to the hub.
The third embodiment of the invention also provides a wind generating set, which comprises the variable pitch system. Since the present embodiment has the pitch system of the above embodiment, the pitch system has the beneficial effects, which are not described herein again.
The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. For example, the algorithms described in the specific embodiments may be modified without departing from the basic spirit of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (13)

1. A transmission (100), said transmission (100) being adapted to rotate a rotating member, comprising:
a first transmission member (110) which is a rotatable member;
a traction member (140) having a first end (141) and a second end (142) opposite to each other in an extending direction thereof, the first end (141) and the second end (142) being connected to the rotating member, the traction member (140) bypassing the first transmission member (110) to form a receiving space (150) between the traction member (140) and the rotating member;
a tension pulley (130) that is provided in the housing space (150) and that provides the traction member (140) with a supporting force from the inside of the housing space (150) to the outside of the housing space (150);
a second transmission member (120) disposed in the accommodation space (150), wherein the second transmission member (120) and the first transmission member (110) are both disposed on a peripheral side of the rotation member;
the first end (141) passes over the first transmission member (110) and is connected to the rotating member, the second end (142) passes over the second transmission member (120) and is connected to the rotating member;
the first end (141) and the second end (142) are both located between the first transmission member (110) and the second transmission member (120).
2. Transmission (100) according to claim 1,
the traction member (140) includes a tension section (145) connected between the first transmission member (110) and the second transmission member (120), and the tension wheel (130) is provided to the tension section (145).
3. The transmission (100) according to claim 2, wherein the number of the tension pulleys (130) is two or more, and the two or more tension pulleys (130) are uniformly distributed in the tension section (145).
4. The transmission (100) according to claim 1, wherein a line between the rotation center of the first transmission member (110) and the rotation center of the rotating member is a first line, a line between the rotation center of the second transmission member (120) and the rotation center of the rotating member is a second line, and an angle between the first line and the second line is greater than or equal to 90 degrees.
5. The transmission (100) according to claim 1, wherein one of the first transmission member (110) and the second transmission member (120) is a driving wheel and the other is a driven wheel, and the radius of the driving wheel is greater than or equal to the radius of the driven wheel.
6. Transmission (100) according to claim 5, wherein an auxiliary braking device is provided on the driven wheel to assist braking of the traction member (140).
7. Transmission (100) according to claim 1, wherein the distance between the first end (141) and the second end (142) along the circumference of the rotating member is smaller than or equal to a second preset distance, wherein the second preset distance is greater than or equal to zero.
8. Transmission (100) according to claim 1,
the first end (141) is provided with a fixed support (146), so that the first end (141) is fixed on the rotating component through the fixed support (146);
the second end (142) is provided with a sliding support (147) to enable the relative position of the second end (142) and the rotating member to be adjustable.
9. The transmission (100) of claim 1, further comprising:
a support surface (160), wherein the tension wheel (130) is arranged on the support surface (160);
an included angle between an axis of the tension wheel (130) and the supporting surface (160) is adjustable, so that the tension wheel (130) can adjust the tension degree of the traction component (140) along the width direction of the traction component (140).
10. The transmission (100) according to claim 9, wherein at least one tensioning wheel (130) is provided with two or more pressure sensors arranged along an axial direction of the tensioning wheel (130), the two or more pressure sensors being used for acquiring a pressure value provided by the traction means (140) to the tensioning wheel (130).
11. The transmission (100) of claim 10, further comprising:
a processor for acquiring the pressure value and determining the tensioning degree of the traction component (140) according to the pressure value; the processor is also used for adjusting an included angle between the axis of the tensioning wheel (130) and the supporting surface (160) according to the tensioning degree.
12. A becomes oar system for wind generating set, wind generating set includes wheel hub and blade, its characterized in that, it includes to become oar system:
the variable-pitch bearing (200) comprises a fixed ring (210) and a rotating ring (220), the fixed ring (210) is connected to the hub, the rotating ring (220) is connected to the blade, and the rotating ring (220) is used for driving the blade to rotate relative to the hub;
the transmission device (100) according to any one of claims 1 to 11, wherein the rotating ring (220) is the rotating component, and the transmission device (100) is used for driving the rotating ring (220) to rotate.
13. A wind park comprising a pitch system according to claim 12.
CN201810393251.9A 2018-04-27 2018-04-27 Transmission device, variable pitch system and wind generating set Active CN110410472B (en)

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CN106917726B (en) * 2017-01-23 2018-11-02 北京金风科创风电设备有限公司 Corner detection method and system and wind driven generator
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Address after: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region

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